Ingram hand-picked her successor, Keith Mullins, who took over as National Director shortly before Day 10. He inherited Ingram's ongoing investigations, including the Haddad network, and immediately made some personnel changes, firing Bashir and hiring Mariana Stiles as his replacement. When the Rangers on the Bin-Khalid mission were killed, Ingram briefly suspected Mullins as a traitor, as the CTU National Director - along with the directors of CIA and NSA - were the only ones privy to their new identifies. Ingram and Andy Shalowitz cleared his name when they discovered that Nilaa Mizrani had apparently been the leak. Mullins, after briefly being detained in secret, resumed his duties and directed CTU to locate Bin-Khalid's cell before it could carry out its attack. ("Day 10: 12:00pm-1:00pm", "Day 10: 2:00pm-3:00pm")
For all intents and purposes, the National Director appears to have identical responsibilities to the CTU Director, as depicted at CTU Los Angeles and CTU New York in earlier seasons of 24. One notable difference is the National Director's role in intelligence gathering and interception of international terrorist networks, compared to those units' domestic focus.